Abstract
The integrated electricity and heating system (IEHS) can satisfy the diversified energy demand and improve energy efficiency through electro-thermal synergy and complementarity, which is beneficial for energy transformation and global climate governance. To reduce the operation cost, renewable energy source (RES) abandonment, and purchased electricity of IEHS, an optimal dispatching method of IEHS with multiple functional areas considering the flow regulation of the heat network is proposed. Firstly, the functional area of IEHS is classified and the functional area’s load characteristics are analyzed. Secondly, a heat network model considering refined resistance and dynamic characteristics is constructed and the operation regulation modes of the heat network are analyzed. Thirdly, an optimal dispatching model of IEHS with multiple functional areas considering heat network flow regulation is established to minimize the operation cost of IEHS with multiple functional areas while considering the penalty cost of RES abandonment and time-of-use electricity price. Finally, a certain region in China is taken as a case study to verify the effectiveness of the proposed optimal dispatching model. The case study shows that the quality regulation mode of the heat network considering flow change in multiple stages can effectively reduce RES abandonment by 2.4%, purchased electricity by 5.4%, and the system operation cost by 1.7%. In addition, compared with the independent dispatching of each functional area, the joint dispatching of IEHS with multiple functional areas can reduce the amount of RES abandonment by 95.2% and purchased electricity by 66.5%, and lower the operation cost of IEHS by 23.6%.
Highlights
In 2020, China proposed the strategic goals of carbon peak by 2030 and carbon neutralization by 2060, which will be conducive to promoting the process of global climate governance
Owing to its renewable energy sources, the integrated electricity and heating system (IEHS) has become one of the main ways to promote the decarbonization of the power industry
The empirical model of the heat transfer process of the pipeline heat carrier is established in [21,22] to study the thermal inertia and transmission delay of thermal systems, which shows that the consideration of the natural heat storage capacity of heating supply networks in the optimal dispatching of the integrated energy system can effectively improve the dispatching flexibility of the system and reduce the operation cost
Summary
In 2020, China proposed the strategic goals of carbon peak by 2030 and carbon neutralization by 2060, which will be conducive to promoting the process of global climate governance. In [11], the heat network interaction among different load characteristic regions is introduced to optimize the configuration and operation of a multi-area integrated energy system. Most of the existing research studies on IEHS with multiple functional areas mainly focus on the energy interaction among multiple regions, and research on dynamic characteristics modeling and the operation mode of thermodynamic systems is not intensive and comprehensive enough. The empirical model of the heat transfer process of the pipeline heat carrier is established in [21,22] to study the thermal inertia and transmission delay of thermal systems, which shows that the consideration of the natural heat storage capacity of heating supply networks in the optimal dispatching of the integrated energy system can effectively improve the dispatching flexibility of the system and reduce the operation cost. Heat Network Model Considering Refined Resistance and Dynamic Characteristics In order to study the influence of the heat network’s operation mode on the w
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